pi netboot with docker

README.md

⚠️ NFS server version 3 in docker behavior is strange, it won't work after restart the containter, and seems raspberry pi kernel have not supported netboot from vers 4 yet(will got kernel panic), so use docker to do this is not reliable for now, if we want to make container work again after stopped we have to restart the host.

☞ use this compose: https://github.com/yangxuan8282/rpi3-pxe-docker , this is the working one

dnsmasq.conf

port=0
dhcp-range=192.168.1.255,proxy
log-dhcp
enable-tftp
tftp-root=/tftpboot
pxe-service=0,"Raspberry Pi Boot"

docker-compose.yml

version: "2"

services:
  netboot_boot:
    image: local/dnsmasq
    privileged: true
    network_mode: "host"
    volumes:
      - ./boot:/tftpboot
      - ./dnsmasq.conf:/etc/dnsmasq.conf

  netboot_root:
    image: local/nfs-server
    privileged: true
    network_mode: "host"
    volumes:
#      - ./exports:/etc/exports
      - ./rootfs:/nfsshare

Dockerfile.dnsmasq

FROM arm32v6/alpine

RUN apk add --no-cache dnsmasq

EXPOSE 53/tcp \
       53/udp \
       67/udp

ENTRYPOINT ["dnsmasq", "--no-daemon", "--user=dnsmasq", "--group=dnsmasq"]

Dockerfile.nfs

FROM arm32v6/alpine

RUN apk --update --no-cache add bash nfs-utils \
  && echo "/nfs/client1 *(rw,sync,no_subtree_check,no_root_squash)" | tee -a /etc/exports
COPY run_nfs /usr/bin/
COPY exports /etc/exports

#VOLUME /nfs/client1

ENTRYPOINT ["run_nfs"]

exports

/nfsshare *(rw,sync,no_subtree_check,no_root_squash)

run_nfs

#!/bin/bash

set -xe

trap "stop; exit 0;" SIGTERM SIGINT

stop()
{
  # We're here because we've seen SIGTERM, likely via a Docker stop command or similar
  # Let's shutdown cleanly
  echo "SIGTERM caught, terminating NFS process(es)..."
  /usr/sbin/exportfs -ua
  pid1=$(pidof rpc.nfsd)
  pid2=$(pidof rpc.mountd)
  kill -TERM $pid1 $pid2 > /dev/null 2>&1
  echo "Terminated."
  exit
}

mkdir -p /nfsshare

# Fixed nlockmgr port
#echo 'fs.nfs.nlm_tcpport=32768' >> /etc/sysctl.conf
#echo 'fs.nfs.nlm_udpport=32768' >> /etc/sysctl.conf
#sysctl -p > /dev/null

mount -t nfsd nfds /proc/fs/nfsd

rpcbind -w
rpc.nfsd -N 2 -V 3 -N 4 -N 4.1 8
exportfs -arfv

rpc.statd
rpc.mountd -N 2 -V 3 -N 4 -N 4.1 -F

Hi there,
I just tried to get this working on my Pi and get this error message:
rpc.mountd: Bad path in mount request from 10.50.1.47: "1000:/nfsshare/root"

In addition to this, I get some errors of this kind:

dnsmasq     | dnsmasq-tftp: sent /tftpboot/bcm2711-rpi-4-b.dtb to 10.50.1.47
dnsmasq     | dnsmasq-tftp: error 0 Early terminate received from 10.50.1.47
dnsmasq     | dnsmasq-tftp: failed sending /tftpboot/overlays/overlay_map.dtb to 10.50.1.47

I attempted to restart the docker container, but this didn't work either. The Kernel on the pi panicked. :/

Here is my approach (based on your repo and this gist)